For those of you who can't be @rsed to clean the bugs off at the time. Put a small amout on of Zipwax in a bucket of warm water, soak the area affected with flies and let it soak for 2-3 minutes, then just simply wipe them off with a sponge soaked in the solution. If you're doing it on a dacron/fabric wing make sure you rinse the soap solution off properly.
